If a mutation creates a new fur color in a wolf population, what factor might determine whether the frequency of the new trait will go up? a. how many other alleles are present b. whether the mutation was caused by nature or by human intervention c. how many phenotypes the population has d. whether the mutation makes some wolves more fit for their environment than other wolves

Option D,whether the mutation makes some wolves more fit for their environment than other wolves

Explanation:

Mutation creating a new fur color in the wolf population will continue to persists in the ecosystem only when it makes the wolf population more fit to survive in the prevailing environmental conditions.

For instance , if the new fur color makes wolf appear as a violent species to its predators then as per the theory of natural selection more and more wolf will interbreed with colorful fur wolf species to produce offspring that are able to cope up with the environment and emerge as the fittest of all.

Hence, option D is correct

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.